Receiving data over serial port

slippygod · #1 22-May-2006, 17:28

I'm programming a C++ console app that receives data over the serial port and does some number crunching on it. I got the serial library over at http://www.codeproject.com/system/serial.asp . I'm hoping someone here is familiar with it, because I'm having problems using it.
First all, I know that the input data is a series of 6 bytes at a baud rate of 115200, no handshaking, and theoretically continues forever. I am using a serial port monitoring program and can confirm that this data is being sent properly. The problem is that my program receives the data, but at varying byte intervals, ranging from 9 to too-many-to-count. There are no control codes or anything in the stream, so if it doesn't read in the 6 bytes per read then the rest of the data won't be correct.

CPP / C++ / C Code:

	serial_in.SetupReadTimeouts(CSerial::EReadTimeoutNonblocking);

	serial_in.SetMask(CSerial::EEventRecv);

	do
	{
		serial_in.WaitEvent();

		DWORD dwBytesRead = 0;
		char szBuffer[7];

		do
		{
			serial_in.Read(szBuffer,sizeof(szBuffer)-1,&dwBytesRead);
			if (dwBytesRead > 0)
			{
				szBuffer[dwBytesRead] = '\0';

		
			}
		}
		while (dwBytesRead == sizeof(szBuffer)-1);
		
		[do calculations here]
	}
	while(true)

I figure the code won't mean much to people who haven't used this specific library, but I'm hoping that someone can give me a hand.
Any help would be appreciated!

soldstatic · #2 03-Aug-2006, 09:32

i dont know anything about that library, but i looked at it when I was going to do all my serial port stuff. ended up finding some really good howto kinda stuff, which i basically threw together in this post:

http://www.gidforums.com/showthread.php?p=46273

i had a ton of trouble trying to get this and that class working and eventually just had to dig in and do it that way^, but it turned out to be really easy since I basically copy and pasted the code into my prog and it worked.

maybe itll help you? if not good luck!

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search
Rate This Thread
Rate This Thread:

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
[Include] Doubly-linked List	dsmith	C Programming Language	6	14-Apr-2006 14:12
Strange C++ code memory leakage problem	gaoanyu	C++ Forum	7	04-Nov-2005 09:09
Problem to read on a serial port	collinm	C Programming Language	2	30-Mar-2005 02:42
Problem with string and serial port	collinm	C Programming Language	13	25-Mar-2005 08:39
[CONTEST?]Data Structure Test	dsmith	C Programming Language	2	06-Jun-2004 16:13

Receiving data over serial port

Re: Receiving data over serial port